Hoisting apparatus.



No. 662,|63. Patented Nov. 20, |900. H. c. SEHR.

HOISTING APPARATUS.

(Application tiled June 25, 1900.) (No Model.) 3 sheets-sheet l.

s v/ l Patented Nov. 20, |900.

H. C. BEHR.

HUISTING APPARATUS.

(Application filed June 25, -1900.)

3 Sheets-Shouf 2.

('Nn Model.)

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HOISTING APPARATUS.

(Application led June 25, 1900.)

(No Model.) 3 SheetsSheet 3.

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UNITED STATES PATENT GFFICE,

HANS C. BFHR, OFSAN FRANCISCO, CALIFORNIA, AsSICNOR TO THF FRASER aCHALMFRS, OF CHICAGO, ILLINOIS.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 662,163, dated November20, 1900. Application led June 25, 1900. Serial No. 21,487. (No model Toall wlwnt t may concern.-

Beit known that I, HANS C. BEHR, a Citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented a new and useful Improvement in HoistingApparatus, of which the following is a specification.

My invention relates to improvements in hoisting machinery of the classemploying multiple drums for use in hoisting from two or more adjacentshaft-compartments of a mine. In machines of this character it ispreferred to employ round ropes winding in single layers upon therespective drums, for the reason that single-layer winding has beenfound to be the best for preventing wear and tear of the ropes. Inconnection with deep mines it is necessary to provide drums possessinglarge winding surfaces, produced either by providing them of largediameter or of smaller diameter and correspondinglyincreased length.There is an Objection to employing drums of very large diameter onaccount of the necessarily large driving-engines or expensive orotherwise objectionable intermediate gearing they render necessary, andwhile drums of comparatively small diameter and increased length arepreferred to drums of larger diameter for the reasons stated it hasalways been a matter of difficulty to cause the rope to wind thereon inan even single layer and without such friction at the drum or sheaves aswill produce undue wear of the rope.

My Object is to provide hoisting apparatus involving two or morehoisting-drums of an improved construction in which the ropes will becaused to wind in a single layer and lay on and payoff smoothly andwithout wear upon the ropes; and my object is, further, to provideimproved counterbalancing Inechanism which will relieve the drivingmechanism of the rope guide-sheave from the weight or greater part ofthe weight of the rope extending down the shaft of the mine and itsfixed load.

In carrying out my invention I provide two or more hoisting-drums, withtheir axes parallel and their windingfaces lying in or nearly in theplane of rotation of the pithead sheaves, over which the ropes are ledfrom the drums on their way to the different shaft-compartments. I alsoprefer to provide the druIn-carrying shafts with double cranks andcoupling -rods connecting the shafts, whereby they will be rotated inunison from the same engine. I also provide a separate guide-sheave overeach drum,mou nted in a carriage geared to the driving mechanism totravel along the drum, causing the guide-sheave to travel at its ropeleading face in a plane vertical and tangential with relation to thedrum, whereby .in traversing the rope guide sheaves the ropes will beproperly guided onto the drums, while the planes of rotation of the ropeguide-sheaves will be the same or nearly the same as 'those of thecorresponding pit-head sheaves.

Referring to the drawings, Figure l is a sectional elevation of myimproved hoisting mechanism; Fig. 2, an enlarged top plan View of thesame constructed with two hoistingdrums and their operating mechanisms;Fig. 3, a still further enlarged longitudinal section through one of thedrums, the section being taken on line 3 in Fig. 2; and Fig. 4, anenlarged section taken on line 4 of Fig. l.

A is one of a pair of shaft-compartments of a mine, deep well, or suchlike bore of underground work. Over the mouth of the shaft is agallows-frame B, carrying a pit-head sheave ct, central over eachhoisting-compartment.

C C are hoisting-drums, and b b are the drum-shafts. The drums may bemounted as shown most clearly in Fig. 3. Each drumshaft b is journaledtoward opposite ends in bearings c and is provided at each end with acrank b', the cranks being at right angles to each other. The drum atone end is supported bya trunnion CZ, loose upon the shaft, and at itsother end is supported by a trunnion d', looselysurrounding alongitudinallysliding sleeve c. In order that the drums Inay be thrownindependently into and out of operation, clutch mechanism is providedbetween each shaft b and its drum, and this clutch mechanism may consistof the bar or disk e', keyed to the shaft, and shoes e2, sliding againstsaid disk and connected by toggle-links e3 with the sleeve e to be slidinto and out of clutching engagement with the friction face or clutchmember e4 of the IOO drum. The clutch may be operated by lever mechanisme5, extending to an operatinghandle e6. Any suitable clutch mechanismmay be employed between the shaft and drum, and I do not herein limit myinvention to or lay any claim to the construction of the clutchmechanism shown. The shafts are driven from an engine, and in thepresent connection I show two engine-cylinders D D at opposite ends ofthe drum, having connecting-rods f, going to the cranks b' of the shaftof the drum C. Coupling-rods f extend from the cranks of the shaft ofthe drum C to the cranks on the shaft of the drum C', whereby the shaftsare operated in unison from one engine.

Above the drums C C in planes tangential, or nearly tangential, theretoare the guidesheaves E E', which divert the ropes X to the drums, saidropes being the hoisting-ropes leading up from the shaft-compartmentsover the pit-head sheaves a down to the guidesheaves E E'. Eachguide-sheave is mounted upon a carriage F, having wheels or rollers g,which travel upon tracks g' on a frame G, extending horizontally andlongitudinally over the adjacent side portions of the drums. Eachcarriage F carries a horizontally-extending rack F'. Each rack isengaged by a pinion h' on the upper end of a vertical shaft h, journaledat its lower end in a bearing h2 and at its upper end in the frame G.The rack may rest upon a guide-wheel g2 on the frame and is held inengagement with the pinion h' by a horizontal guide-wheel g3. Motion isgiven to the carriages from the respective drums through any suitablegearing between the pinions h and drums, and the gearing for thispurpose shown in the drawings comprises gear-teeth d upon the trunnionsd, engaging gears 'L' upon shafts t', carrying beveled pinions '112,engaging beveled gears h3 on the shafts 72,. The gears between the drumsand carriages are such that the guide-sheaves will be movedlongitudinally of the drums a distance corresponding approximately withthe width of the rope X, employed in each revolution of the drum. Therelation between the drums is such that as one is winding up a rope theother is causing its rope to pay out.V The strain upon a carriage Funder the pull of the ropeX naturally increases as the rope lengthens indescending the shaft and decreases as the rope shortens in rising out ofthe shaft. It is very desirable that this strain shall be equalized asfar as possible, and thereby relieve the operating mechanism from allstrain except that exerted by the ore or other load to be raised fromthe shaft. The counterbalancing mechanism for the rope which I prefer toemploy consists of a variable lever H, provided on its long arm with anadjustable Weight H and havinga short arm H2 in the arc of a circleeccentric with relation to the pivot or fulcrum H3 of the lever. A ropeor cable Y is fastened at one end to the carriage at k and extends overa guide wheel Z on the frame G and over the curved face of the short armH2 of the lever. Thus as the carriage moves away from the lever H ittends to swing the weighted end H toward the horizontal plane, and atthe same time its engagement with the short arm of the lever movesgradually nearer the fulcrum H3. The resistance or counter pull of thelever upon the carriage thus increases as the rope X pays out from thedrum aqnd diminishes as the rope is laid onto the drum to counterbalancemore or less nearly the increasing and diminishing pull of the rope X.

While I have shown my improvements in connection with two parallelcylindrical drums, they are applicable with equal benefit tofrusto-conical drums. When the latter are employed, the tracks g' mayextend at an angle to each other corresponding with the angles of thewinding-faces of the drums, whereby the guide-sheaves will move at theirropeleading faces in planes tangential, or nearly so, with relation tothe drums, while rotating in planes corresponding with those of thepithead sheaves to prevent wear upon the ropes, and while I have shownbut two drums additional drums may be provided for additionalshaft-compartments and all may be operated from the same engine throughadditional connecting or coupling rods. If desired, the drum-shafts mayhave buta single crank at one end or a double crank at one end insteadof one at each end, as shown, and

the engine would be provided accordingly.

While I prefer to construct my improve- IOO ments throughout as shownand described,`

they may be variously modied as to details of construction withoutdeparting from the spirit of my invention as defined by the claims.

What I claim as new, and desire to secure by Letters Patent, is-

' l. In a hoisting apparatus, the combination with a pit-head sheave, ofa hoisting-drum, a shaft on which the drum is mounted having its axisparallel or approximately so to the plane of said pit-head sheave, atrack above the drum extending parallel with the ropeleading facethereof, a carriage on the track, a rope guide-sheave on the carriageextending approximately in the plane of the pithead sheave, andrack-andpinion propelling .y

trunnions, engaging and releasing clutch mechanism between the shaftsand their drums, tracks above. the drums, carriages on said tracks, ropeguide-sheaves on the carriages extending approximately in the planes oftheir companion pit-head sheaves,and racky andpinion propellingmechanism for each eale's carriage actuated from the trunnions of therespective drums to move the rope guidesheaves at theirl rope-leadingfaces in vertical planes approximately tangential With relation to therope-leading faces of the respective drums.

3. In a hoisting apparatus, the combination With a hoisting-drum, a ropeguide-sheave movable along the drum and a traveling carriage on Whichsaid sheave is mounted, of variable-lever rope-counterbalancingmechanism connected with the carriage and operating to increaseresistance to movement of the carriage as the rope pays out from thedrum and decrease said resistance as the rope is Wound upon the drum,substantially as and for the purpose set forth.

HANS C. BEI-IR; In presence ol'- D. W. LEE, A. D. BACCI.

